Automatic valve for steam-radiators



(N6 Mode-l.) I H. A, RICE 8t S. GRAHAM.

AUTOMATIC VALVE FOR STEAM RA'DIATORS, N0.-.'379,981. I Patented Mar. '27, 1888.

Mms 8 Y UN TED Y STATES PATENT ()FE CE.

HENRY A. RICE -AND SETH GRAHAM, OF DES MOINES, IOWA.

AUTOMATIC VALVE FOR STEAM-RADIATORS.

SPECIFICATION forming part of Letters Patent No. 379,981, dated March 27, 1888.

Application filed June 23, 1887. Serial No. 242,312. (No model.) A

To all whom it may concern:

Be it known that we, HENRY A, Rich. and SETH GRAHAM, citizens of the United States of America, and residents of Des Moines, in the county of Polk and State of Iowa, have Invented an Automatic Valve for Steam-Badiators, of which the following is a specification.

Our invention consists in the construction and combination of a valve and a three-way cock, as hereinafter set forth, pointed out in our claims, and illustrated in the accompanying drawings, in which- Figure 1 is a .longitudinal sectional view of our valve, with which there is no three-way cock combined. Fig. 2 is a side view of the valve, showing a three-way cock combined therewith. Fig. 3 is a sectional view taken through the line or mof Fig. 2. Fig. 4isaview through the line 2 z of Fig. 2. Fig. 5 shows the valve applied to a radiator as required for practical use.

A is an elbow-shaped tube provided with screw-threaded ends and annular flanges or shoulders.

E is the main portionof the valve. It has a central longitudinal bore that is enlarged at its ends and screw-threaded on the inside at one end, to adapt it to be fixed on the end of the tube A, and screw-threaded on its outside and opposite end to receive a detachable and adjustable cap, k.

m is a miter-'valvefitted to a corresponding seat in the bore of the tube E and provided with a stem, m, that extends through the bore. This stem has a shoulder, m, and an extension, m, that extends out through a perforation in the center of the cap 70.

n is a coiled spring placed on the stem-extension m, to engage the shoulderm in such a manner that when the cap is screwed in its the tube A to press the'valve m upon its seat, air is allowed to pass to and from the radiator through a slot formed across the flat end face of the valve m, the cap 7c, and a vent formed in the tube E to intersect its bore, as shown in Fig. 1. When the steam is admitted into the radiator, cold air will-be thereby expelled from the tubes of the radiator through the open valve," and the valve automatically closed when the cold air is thus removed, 'as required elbow-shaped tube A, as shown,the valve can be readily made inoperative and steam and air passed through the tube A without going through the valve. By means of the groove across the fiat end face of the miter-valve the valve can be rotated as required to grind and fit it to its seat.

I We claim as our invention 1. The-combination of the tube A, having screw-threaded ends, the tube E, internally screwthreaded at one end and externally screw-threaded at the other end, havingalongitudinal bore that is enlarged at its opposite ends and a valve-seat in said bore, a cap, is, a valve, m, having a stem, m, a shoulder, m", and an extension, m, and spring 42, substantially as shown and described, for. the purposes stated. a

. 2. The combination of an elbow-shaped tube having a three-way cook, a tube internally screw -threaded at one end and externally screw-threaded at the other end, having a longitudinal bore that is enlarged at its central portion, a miter-valve that has a slot-across its flat-end face,a valve-stem that has a shoulcap, for the purposes stated.

HENRY, A. EIoE. SETH GRAHAM.

'der, a spring, and an internally screw-threaded 

